Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752201AbYLCOMP (ORCPT ); Wed, 3 Dec 2008 09:12:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750842AbYLCOL7 (ORCPT ); Wed, 3 Dec 2008 09:11:59 -0500 Received: from an-out-0708.google.com ([209.85.132.246]:1546 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750799AbYLCOL7 (ORCPT ); Wed, 3 Dec 2008 09:11:59 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=kiUOhe1+reqsq8v2oplHUoCaIKHCXoquJJCeW4bNmgJn6/pikrNkI2D1rQTOHkbC91 p5XSX+jbHjHbD0/c4bIcyaayVBLGHPoAEG+uThirwke/7K0etNpr7R5zdlo1f3EnFRNq v+AKsDGqAzfyD9YlwbOJwo33HpJNfAReJ6fV4= Message-ID: <804dabb00812030611k222606a6j24097fcdd93862d2@mail.gmail.com> Date: Wed, 3 Dec 2008 22:11:57 +0800 From: "Peter Teoh" To: LKML Subject: Kernel Error Message: modprobe used greatest stack depth MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1776 Lines: 45 In less than 6 hours since I turned on the machine I have been getting these message (spread over different times) in my dmesg: Machine A (AMD Athlon 4200, 3G RAM): khelper used greatest stack depth: 7484 bytes left modprobe used greatest stack depth: 7184 bytes left mknod used greatest stack depth: 6976 bytes left showconsole used greatest stack depth: 6904 bytes left modprobe used greatest stack depth: 5600 bytes left mysearch.pl used greatest stack depth: 5536 bytes left mysearch.pl used greatest stack depth: 5496 bytes left firefox-bin used greatest stack depth: 5484 bytes left totem-video-thu used greatest stack depth: 5324 bytes left thunderbird-bin used greatest stack depth: 4864 bytes left And another machine (intel, 3G RAM): [ 0.123030] khelper used greatest stack depth: 2768 bytes left [ 3.518510] insmod used greatest stack depth: 2148 bytes left [ 6.203832] insmod used greatest stack depth: 1424 bytes left Seemingly harmless, but when it hit firefox, the entire firefox will hang - and it does not respond to any keyboard/mouse input. Since it has hit two of my machine simultaneously, I don't it should be ignored. Can someone help me? a. How do I probe further the cause of the error? b. Seemingly repeatable ..... how to generate a BUG() stack trace at the point of error - recompiling really needed? c. Kernel version 2.6.28-rc6, with FTRACE compiled option turned on. HOw do I used FTRACE to de -- Regards, Peter Teoh Ernest Hemingway - "Never mistake motion for action." -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/